Improvement in machines for reducing wires for needle-blanks



T. FOWLER.

Makmg Needle Blanks No. 68,430. Patented Sept 3, 1867.

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THADDEUS FOWLER, OF SEYMOUR, CONNECTICUT.

LMPROVEMENT lN MACHINES FOR REDUCING WIRES FOR NEEDLE-BLANKS.

Specification forming part of Letters Patent No. 68,430, dated September 3, 1867.

To all whom itmcty concern:

Be it known that I, THADDEUS FOWLER, of Seymour, in the county of New Haven, and State of Connecticut, have invented certain new and useful Improvements in Machines for Reducing Wires for Needle- Blanks; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, making a part of this specification, in which Figure 1 represents a side elevation of the machine.

Figure 2 represents an end view of the same.

Figure 3 represents a vertical transverse section through the reducing-dies and cam or tappet-wheel.

Figure 4 represents a View of the blankholder and blank; and

Figure 5 represents the shape of the groove in the die.

Similar letters of reference where they occur in the separate figures denote like parts in all the drawings.

My invention consists in reducing wires for needle-blanks by a machine wherein a peculiar turning motion is imparted to the blank whilst it is being acted upon by a series of blows between a stationary and a movable die, as will be explained;

In the pillar blocks A is supported a shaft, 13, to which motion is given in any usual wellknown way. Upon this shaft there is a tappet-wheel, C, and a turning-ratch, D. On the bed or frame, and underneath the tappetwheel 0, there is a stationary anvil-block or die, E; and immediately over it, and between it and the tappet-wheel, there is a spring or yielding die, F, with a very small space between the dies, as seen at a, fig. 3. In each of these dies E F there is cut, so as to match each other, a groove, (0, fig. 5,) which is more contracted at its middle than at its ends, and so that anything passed between the dies would be more tightly griped at the centre than at the ends. G is a hollow mandrel, supported in the pieces e e; and upon this mandrel G there is a ratchet-wheel, II, which is actuated by the ratchet D on the shaft B,

as will be hereafter explained. A holder, I, receives the blank f that is to be reduced, drawn down, or shaped between the dies. On this holder there is a feather or stud, h; and in the bore of the hollow mandrel G there is a groove, 2', that will receive the feather or stud h when the holder is inserted therein, and which causes the mandrel and holder to revolve together when the machine is in operation. Upon the tappet-wheel C there is a series of tappets, m m m, or slight projections; and upon the upper side of the springdie F there is a projection, 91, against which the tappets m strike in succession, giving to said die F a chattering motion upon the under die E, or any substance between them, the shank F of the die F admitting of sulficient yield and reaction to allow the dies to come together, and then the upper one to rebound from the under one. The ratchet D has teeth 4' upon it, which are much farther 1 til the next tooth onD comes up and strikes the next tooth on H; and during this momentary cessation of turning, the tappet strikes the projection 41., and gives a blow and a rebound. before the'next turning motion takes place. Thus the turning takes place when there is no pressure upon the dies; and there are no rounded scratches upon the blank, because when turned there is no griping or striking of the dies. The contracted form of the grooves c in the dies at their centres is that the reducing of the wire may be mainly done at that point, and give the blank an opportunity to elongate, as it must do under the series of blows, and the transposition of the metal. There is a springplate, i, that presses upon the mandrel just sufficient to prevent it from moving when the ratchets are not feeding, or when the mandrel and blank are not to be turned. Any attempt to turn the blank when the dies are griping it would mar and injure it.

Having thus fully described myinvention,

What I claim therein as new, and desire to secure by Letters Patent, is

1. In combination with the turning-ratchets, mandrel, and blank-holder, the dies F and E for reducing and allowing the blanks to elongate under the red notion, substantially as described.

2. I also claim, in combination with the turning-ratehets, mandrel, blank-holder, and (lies, the tappet-Wheel C, With its tappets 30 arranged as to strike the die Whilst the feed is at rest, substantially as described. THADDEUS FOXVLER.

Vithesses:

A. B. STOUGHTON, R. O. LAMBERT. 

